Multi-row battery module, battery pack and electric equipment

Abstract

The invention relates to a multi-row battery module, a battery pack and electric equipment, and relates to the technical field of power batteries. The multi-row battery module comprises at least two battery cell modules, at least three side cold plates and a plurality of connecting pieces, each battery cell module comprises a plurality of battery cell monomers which are arranged in sequence; the at least three side cold plates are sequentially arranged, two end plates are arranged between any two adjacent side cold plates, the at least three side cold plates are matched with the end plates to define at least two accommodating spaces, and the battery cell modules are correspondingly arranged in the accommodating spaces. The connecting piece penetrates through the side cold plate and is connected to the end plate on one side or two sides of the side cold plate. The multi-row battery module provided by the invention can solve the problems of low strength and serious heating of the connection position of the multi-row battery module in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a multi-row battery module, a battery pack and an electrical device. Background Art

[0002] When assembling a power battery, multiple battery cells are usually arranged to form a battery module, and then the multiple battery modules are placed in a battery box to complete the assembly.

[0003] In the prior art, when applied to a multi-row battery module solution, such as a double-row battery module solution, a plurality of end plates are usually first arranged to enclose a frame structure, and then two groups of battery modules are fixed together in the frame structure.

[0004] However, when the above structure is in use, the two groups of battery modules are only fixed by the outer frame structure, resulting in low connection strength at the junction of the two groups of battery modules. Especially when applied to three, four or more rows of battery modules, the above arrangement causes the multi-row battery modules to fail to meet the overall connection strength requirements of the power battery. Furthermore, during the use of the battery pack, heat will accumulate at the connection position of two adjacent rows of battery modules, causing the battery pack to heat up severely as a whole, affecting the safety and service life of the battery pack. Summary of the invention

[0005] The purpose of the present application is to provide a multi-row battery module, a battery pack and an electrical device, wherein the multi-row battery module can solve the problem of low connection strength and severe heat generation of the multi-row battery modules in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an embodiment of the present application provides a multi-row battery module, which includes at least two battery cell modules, at least three side cold plates and connectors. Each battery cell module includes a plurality of battery cell monomers, and the battery cell monomers are arranged in sequence. At least three side cold plates are arranged in sequence, and two end plates are arranged between any two adjacent side cold plates. At least three side cold plates cooperate with the end plates to form at least two accommodating spaces, and the battery cell modules are correspondingly arranged in the accommodating spaces. The connector passes through the side cold plate and is connected to the end plate on one side or both sides of the side cold plate.

[0007] Based on the above-mentioned embodiments of the present application, an accommodation space is formed by the cooperation of the end plate and the side cold plate, and the number of the side cold plates and the end plates is set according to the number of the battery cell modules. For example, when the number of battery cell modules is two, three side cold plates are correspondingly provided, and cooperate with the end plates to enclose two accommodation spaces, so that the two battery cell modules are respectively arranged in the two accommodation spaces. Through the above-mentioned arrangement, the fixed structure formed by the cooperation of the side cold plates and the end plates can fix each battery cell module individually, thereby improving the overall connection strength. At the same time, at this time, side cold plates are provided on both sides of the battery cell module, that is, side cold plates are also provided at the junction of adjacent battery cell modules, thereby enhancing the heat dissipation and cooling effect of the junction of the battery cell modules and improving the overall heat dissipation effect of the multi-row battery modules. Furthermore, by providing a connecting piece, the connecting position of the side cold plate and the end plate is connected and fixed. When the side cold plate is provided between two battery cell modules, the connecting piece passes through the side cold plate and is simultaneously inserted into the end plates on both sides, thereby not only realizing the connection between the middle side cold plate and the end plate, but also strengthening the connection between two adjacent groups of battery cell modules, that is, strengthening the connection strength of the junction position of two adjacent battery cell modules, thereby improving the overall connection strength of the multi-row battery modules.

[0008] In some embodiments, at least three side cold plates are provided. The side cold plates at the ends are connected to the end plates by connecting pieces, the connecting pieces are provided as bolts, the end plates are provided with threaded holes directly or indirectly, the bolts penetrate the side cold plates and are threadedly connected to the threaded holes. The side cold plates in the middle are connected to the end plates by connecting pieces, the connecting pieces are provided as connecting fasteners, the connecting fasteners penetrate the side cold plates, and the two ends of the connecting fasteners are respectively plugged and connected to the end plates on both sides.

[0009] Based on the above-mentioned embodiments of the present application, when the side cold plate at the end is connected to the end plate, the connecting member only needs to ensure that the end plate and the side cold plate can be stably fixed. Therefore, the connecting member is directly set as a bolt. Through the connection between the bolt and the threaded hole on the end plate, the connection between the end plate and the side cold plate is ensured to be stable while making the connection process more convenient. When the side cold plate set in the middle is connected to the end plate, battery modules are set on both sides of the side cold plate, that is, the side cold plate is located at the intersection of the two battery modules. By setting the connecting member as a connecting fastener, the connecting fastener is inserted into the end plates on both sides at the same time after passing through the side cold plate, so as to not only realize the connection between the end plates on both sides and the side cold plate respectively, but also can connect the two end plates, so that the connection strength of the intersection of the two battery modules is strengthened. In specific use, the connecting fastener can be set as a connecting column or other structure.

[0010] In some embodiments, a limiting cavity is provided at the end of the end plate close to the side cold plate, and a limiting member is provided in the limiting cavity, and the limiting member contacts the inner wall surface of the limiting cavity. A threaded hole is provided on the limiting member, and a bolt passes through the side cold plate and is threadedly connected to the threaded hole. The connecting fastener passes through the side cold plate and is inserted into the limiting member.

[0011] Based on the above-mentioned embodiments of the present application, when the connecting member connects the end plate and the side cold plate, the connection position between the end plate and the side cold plate will be subjected to shear force, and the shear force directly acts on the limit member through the connecting member. The surface contact between the limit member and the inner wall of the limit cavity increases, thereby increasing the contact area between the limit member and the end plate, thereby reducing the influence of the shear force on the end plate, thereby strengthening the connection strength of the connection position between the end plate and the side cold plate.

[0012] In some embodiments, the limiting member is connected to the inner wall of the limiting cavity by screw connection or riveting.

[0013] Based on the above-mentioned embodiments of the present application, the connection between the limiter and the end plate is further strengthened by screw connection or riveting, thereby further improving the connection strength of the connection position between the end plate and the side cold plate.

[0014] In some embodiments, an embedded groove is formed in the end plate, and the end of the connecting fastener passes through the limiting member and is inserted into the embedded groove. An adhesive layer is provided on the surface of the connecting fastener to fix with the limiting member and the embedded groove.

[0015] Based on the above-mentioned embodiments of the present application, by forming an embedded groove in the end plate, the provision of the embedded groove can further increase the insertion depth of the connection fastener in the end plate, thereby further increasing the connection strength between two adjacent groups of battery core modules. By providing an adhesive layer on the surface of the connection fastener, the connection strength between the connection fastener and the stopper and the end plate is strengthened.

[0016] In some embodiments, the multi-row battery module further includes at least one middle plate, which is located between the two end plates and divides the accommodation space into at least two accommodation sub-cavities. The middle plate is connected to the side cold plates at the ends by bolts, which pass through the side cold plates and are threadedly connected to the middle plate. The middle plate is connected to the side cold plates in the middle by connecting fasteners, which pass through the side cold plates and are plugged into the middle plates on both sides.

[0017] Based on the above-mentioned embodiments of the present application, by setting the middle plate, when the length of the multi-row battery module is extended to form a long module, the setting of the middle plate can strengthen the middle part of the long module battery. At the same time, the middle plate is also connected to the side cold plate through a connector to further improve the overall connection strength of the multi-row battery module.

[0018] According to a second aspect of the present application, a battery pack is provided, which includes a frame and at least one of the above-mentioned multi-row battery modules, wherein the battery modules are arranged in sequence and fixed in the frame.

[0019] Based on the above-mentioned embodiments of the present application, a battery pack is formed by arranging multiple rows of battery modules in a frame, and the above-mentioned multiple rows of battery modules based on the above-mentioned arrangement of the present application have a high connection strength between adjacent battery modules and a good heat dissipation effect, thereby improving the overall connection strength and heat dissipation effect of the battery pack. At the same time, in the above-mentioned arrangement, the frame structure formed by the side cold plate and the end plate can play a technical effect similar to the cross beam and longitudinal beam in the prior art, that is, the battery module is accommodated and fixed by the frame structure formed by the side cold plate and the end plate, so that when the battery pack is arranged in groups, the cross beam and longitudinal beam structure can be completely or partially omitted, thereby further improving the overall integration of the battery pack.

[0020] In some embodiments, an extended fin is provided on the side of the side cold plate at the end facing away from the battery cell module, and the extended fin is fixedly connected to the frame.

[0021] Based on the above-mentioned embodiments of the present application, the provision of the extended fins facilitates the fixed connection between the side cold plate and the frame. At the same time, the extended fins can be provided integrally with the side cold plate, thereby avoiding damage to the side cold plate during connection.

[0022] In some embodiments, the battery pack further includes a bottom guard plate, which is respectively connected to the frame and the multiple rows of battery modules.

[0023] Based on the above-mentioned embodiments of the present application, multiple rows of battery modules are protected from below by providing a bottom guard plate. At the same time, multiple rows of battery modules and the top of the frame are directly connected to the vehicle body structure, thereby completing the fixed protection of multiple rows of battery modules while improving the degree of integration.

[0024] According to a third aspect of the present application, there is provided an electrical device, which includes a device body and the above-mentioned battery pack, wherein the device body has a battery assembly cavity, and the battery pack is disposed in the battery assembly cavity.

[0025] Based on the above-mentioned embodiments of the present application, the electrical equipment provided by the present application includes the above-mentioned battery pack, and therefore also has the above-mentioned beneficial effects. In order to avoid repetition, they will not be described here.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the structure of a double-row battery module provided in an embodiment of the present application.

[0029] Figure 2 It is an exploded schematic diagram of a double-row battery module provided in an embodiment of the present application.

[0030] Figure 3 It is a plan view of a double-row battery module provided in an embodiment of the present application.

[0031] Figure 4 yes Figure 3 Schematic diagram of the cross section along the AA direction.

[0032] Figure 5 yes Figure 3 Schematic diagram of the cross section along the BB direction.

[0033] Figure 6 It is a schematic diagram of the structure of the middle end plate of the multi-row battery module provided in an embodiment of the present application.

[0034] Figure 7 It is a cross-sectional schematic diagram of an end plate in a multi-row battery module provided in an embodiment of the present application.

[0035] Figure 8 It is a schematic diagram of the structure of the limiting components in the multi-row battery module provided in the embodiment of the present application.

[0036] Fig. 9 It is a schematic diagram of the structure of the battery pack provided in an embodiment of the present application.

[0037] Fig.10 It is an exploded schematic diagram of multiple rows of battery modules in a battery pack provided in an embodiment of the present application.

[0038] Fig.11 It is a schematic diagram of the structure of the frame in the battery pack provided in the embodiment of the present application.

[0039] Description of Reference Numerals

[0040] 1. Cell module; 2. Side cold plate; 21. Extended fin; 3. End plate; 31. Limiting cavity; 32. Embedded groove; 4. Middle plate; 5. Limiting piece; 54. Connecting nut; 6. Connecting piece; 61. Bolt; 62. Connecting fastener; 7. Frame; 71. Reinforcing beam; 72. Protrusion; 8. Bottom guard plate; 81. Blocking plate. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of this application, it should be noted that, in the absence of any contrary explanation, the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] When assembling a power battery, multiple battery cells are usually arranged to form a battery module, and then the multiple battery modules are placed in a battery box to complete the assembly.

[0048] In the prior art, when applied to a multi-row battery module solution, such as a double-row battery module solution, a plurality of end plates are usually first arranged to enclose a frame structure, and then two groups of battery modules are fixed together in the frame structure.

[0049] However, when the above structure is in use, the two groups of battery modules are only fixed by the outer frame structure, resulting in low connection strength at the junction of the two groups of battery modules. Especially when applied to three, four or more rows of battery modules, the above arrangement causes the multi-row battery modules to fail to meet the overall connection strength requirements of the power battery. Furthermore, during the use of the battery pack, heat will accumulate at the connection position of two adjacent rows of battery modules, causing the battery pack to heat up severely as a whole, affecting the safety and service life of the battery pack.

[0050] In order to solve the above problems in the prior art, according to the first aspect of the present application, an embodiment of the present application provides a multi-row battery module, referring to Figure 1 and Figure 2 As shown in , the multi-row battery module includes at least two battery cell modules 1, at least three side cold plates 2 and a plurality of connectors 6. Each battery cell module 1 includes a plurality of battery cell monomers, and the battery cell monomers are arranged in sequence. At least three side cold plates 2 are arranged in sequence, and two end plates 3 are arranged between any two adjacent side cold plates 2. At least three side cold plates 2 cooperate with the end plates 3 to enclose at least two accommodating spaces, and the battery cell modules 1 are correspondingly arranged in the accommodating spaces. The connector 6 passes through the side cold plate 2 and is connected to the end plate 3 on one side or both sides of the side cold plate 2.

[0051] Based on the above-mentioned embodiments of the present application, the end plate 3 cooperates with the side cold plate 2 to form a receiving space, and the number of the side cold plates 2 and the end plates 3 is set according to the number of the battery cell modules 1. For example, when there are two battery cell modules 1, three side cold plates 2 are correspondingly set, and cooperate with the end plates 3 to enclose two receiving spaces, so that the two battery cell modules 1 are respectively set in the two receiving spaces. Through the above-mentioned setting, each battery cell module 1 can be fixed separately through the fixing structure formed by the side cold plate 2 and the end plate 3, thereby improving the overall connection strength.

[0052] At the same time, side cold plates 2 are provided on both sides of the battery cell module 1, that is, side cold plates 2 are also provided at the intersection of adjacent battery cell modules 1, thereby enhancing the heat dissipation and cooling effect of the intersection of the battery cell modules 1 and improving the overall heat dissipation effect of the multi-row battery modules.

[0053] Furthermore, the connecting position of the side cold plate 2 and the end plate 3 is connected and fixed by setting a connecting piece 6. When the side cold plate 2 is set between two battery cell modules 1, the connecting piece 6 passes through the side cold plate 2 and is simultaneously connected to the end plates 3 on both sides, thereby not only realizing the connection between the middle side cold plate 2 and the end plate 3, but also strengthening the connection between the two adjacent groups of battery cell modules 1, that is, strengthening the connection strength of the junction position of the two adjacent battery cell modules 1, thereby improving the overall connection strength of the multi-row battery module.

[0054] Specifically, in the present application, the specific structure of the connecting member 6 can be any suitable structure.

[0055] refer to Figures 3 to 5 As shown in , in an exemplary embodiment provided in the present application, at least three side cold plates 2 are provided. The side cold plate 2 at the end is connected to the end plate 3 via a connector 6, and the connector 6 is configured as a bolt 61. A threaded hole is directly or indirectly provided at the end of the end plate 3, and the bolt 61 penetrates the side cold plate 2 and is threadedly connected to the threaded hole. The side cold plate 2 located in the middle is connected to the end plate 3 via a connector 6, and the connector 6 is configured as a connecting fastener 62, which penetrates the side cold plate 2, and the two ends of the connecting fastener 62 are respectively plugged into the end plates 3 on both sides.

[0056] Based on the above-mentioned embodiments of the present application, when the side cold plate 2 located at the end is connected to the end plate 3, the connecting member 6 only needs to ensure that the end plate 3 and the side cold plate 2 can be stably fixed. Therefore, the connecting member 6 is directly set to a bolt 61. Through the connection between the bolt 61 and the threaded hole on the end plate 3, the connection between the end plate 3 and the side cold plate 2 is ensured to be stable, while making the connection process more convenient.

[0057] When the side cold plate 2 arranged in the middle is connected to the end plate 3, battery cell modules 1 are arranged on both sides of the side cold plate 2, that is, the side cold plate 2 is located at the intersection of the two battery cell modules 1. By setting the connecting piece 6 as a connecting fastener 62, the connecting fastener 62 is inserted into the end plates 3 on both sides after penetrating the side cold plate 2, thereby not only realizing the connection between the end plates 3 on both sides and the side cold plate 2 respectively, but also connecting the two end plates 3, so that the connection strength of the intersection of the two battery cell modules 1 is strengthened.

[0058] Specifically, when there are three side cold plates 2, two end plates 3 are set between any two adjacent side cold plates 2, and the three side cold plates 2 cooperate with the four end plates 3 to form two accommodating sub-cavities, and the two battery modules 1 are set in the two accommodating sub-cavities. At this time, the multi-row battery modules are set as double-row battery modules. At this time, the two side cold plates 2 on both sides are connected and fixed to the end plates 3 on one side by bolts 61, and the side cold plate 2 in the middle is connected to the end plates 3 on both sides by connecting fasteners 62, so as to strengthen the connection strength of the connection position of the two groups of battery modules 1.

[0059] Alternatively, when there are four side cold plates 2, six end plates 3 are correspondingly provided. At this time, the side cold plates 2 cooperate with the end plates 3 to form three accommodating sub-cavities, and the three battery cell modules 1 are correspondingly provided in the three accommodating sub-cavities. At this time, the multiple rows of battery modules are provided as three rows of battery modules. At this time, the two side cold plates 2 located on both sides are connected and fixed to the end plate 3 on one side by bolts 61, and at this time, the two side cold plates 2 in the middle are simultaneously connected to the end plates 3 on both sides by connecting fasteners 62. Through the above arrangement, the strength of the connection position of any two adjacent groups of battery cell modules 1 is strengthened, thereby strengthening the overall strength of the multiple rows of battery modules.

[0060] Furthermore, the multiple rows of battery modules can also be arranged into structures such as four rows, five rows and six rows. In this case, the number of side cooling plates 2 and end plates 3 can be arranged accordingly according to the requirements, and the present application does not impose any specific restrictions on this.

[0061] Specifically, in actual use, the connecting fastener 62 can be set as a cylindrical structure. By setting the connecting fastener 62 as a cylindrical structure, it can be easily plugged in and at the same time the connecting fastener 62 can ensure a higher shear strength.

[0062] Further, as shown in the above description of the present application, when the connecting member 6 is configured as a bolt 61 , the corresponding threaded hole can be directly or indirectly disposed at the end of the end plate 3 .

[0063] When the threaded hole is directly provided at the end of the end plate 3 , the end plate 3 can be provided as a solid structure to enhance the strength of the end plate 3 itself, and the bolt 61 penetrates the side cold plate 2 and is directly threadedly connected to the threaded hole of the end plate 3 .

[0064] Alternatively, the threaded hole can be indirectly provided at the end of the end plate 3 by providing other connection structures. Figures 5 to 8 As shown in , in some embodiments of the present application, a limiting cavity 31 is provided at the end of the end plate 3 close to the side cold plate 2, and a limiting member 5 is arranged in the limiting cavity 31, and the limiting member 5 contacts the inner wall surface of the limiting cavity 31. A threaded hole is arranged on the limiting member 5, and a bolt 61 passes through the side cold plate 2 and is threadedly connected with the threaded hole. A connecting fastener 62 passes through the side cold plate 2 and is inserted into the limiting member 5.

[0065] Based on the above-mentioned embodiment of the present application, when the connector 6 connects the end plate 3 and the side cold plate 2, the connection position of the end plate 3 and the side cold plate 2 will be subjected to shear force, and the shear force directly acts on the stopper 5 through the connector 6. The contact area between the stopper 5 and the end plate 3 is increased through the surface contact between the stopper 5 and the inner wall of the stopper cavity 31, thereby reducing the influence of the shear force on the end plate 3, thereby strengthening the connection strength of the connection position of the end plate 3 and the side cold plate 2. In this process, the threaded hole is provided on the stopper 5, and the stopper 5 is provided in the stopper cavity 31 at the end of the end plate 3, that is, the threaded hole is indirectly provided at the end of the end plate 3 in this way, so as to realize the indirect threaded connection between the end plate 3 and the bolt 61.

[0066] Specifically, the specific structure of the stopper 5 can be set in any appropriate manner. For example, the stopper 5 is set as a solid cubic structure, in which case the stopper cavity 31 can be set as a cubic cavity structure, the threaded hole is directly opened on the stopper 5, and a hole is directly opened on the stopper 5 for connecting the fastener 62. Alternatively, the stopper 5 can also be set as a hollow structure, in which case a connecting nut 54 can be set on the hollow stopper 5 to ensure the connection strength, and the bolt 61 is directly connected to the connecting nut 54 to enhance the connection strength.

[0067] Furthermore, in order to further strengthen the connection strength between the side cold plate 2 and the end plate 3, refer to Figure 7 As shown in , in some embodiments of the present application, the limiting member 5 can also be connected to the inner wall of the limiting cavity 31 by screw connection or riveting.

[0068] Based on the above-mentioned embodiments of the present application, the connection strength between the limiter 5 and the end plate 3 is enhanced by screw connection or riveting, thereby further enhancing the connection strength of the connection position between the end plate 3 and the side cold plate 2, thereby enhancing the overall connection strength of the multi-row battery module.

[0069] Furthermore, since the end plate 3 is located between the two side cold plates 2 and connected to the side cold plates 2, the direction of the shear force on the end plate 3 is consistent with the thickness direction of the end plate 3. Therefore, when the limit member 5 contacts the limit cavity 31, it is necessary to ensure that the surface of the limit member 5 along the thickness direction of the end plate 3 is in surface contact with the inner wall of the limit cavity 31, thereby reducing the influence of the shear force on the end plate 3 by expanding the force-bearing area.

[0070] In addition, it should be noted that the specific material of the connection member 6 and the stopper 5 and other structures is not limited in the present application. In the specific production and processing process, the connection member 6 and the stopper 5 and other structures can be made of any suitable material while ensuring their own strength. For example, the connection member 6 and the stopper 5 can both be made of high-carbon steel, or the connection member 6 and the stopper 5 can be made of a high-strength composite material, and the present application does not make any specific restrictions on this.

[0071] refer to Figures 5 to 7 As shown in , in some embodiments provided in the present application, an embedded groove 32 is formed in the end plate 3, and the end of the connecting fastener 62 passes through the limiter 5 and is inserted into the embedded groove 32. An adhesive layer is provided on the surface of the connecting fastener 62 to fix it with the limiter 5 and the embedded groove 32.

[0072] Based on the above-mentioned embodiments of the present application, the setting of the embedded groove 32 can further increase the insertion depth of the connecting fastener 62 in the end plate 3, and then the setting of the adhesive layer can further realize the fixation between the connecting fastener 62 and the limit member 5, so that the connection strength between the side cold plate 2 located in the middle and the end plates 3 on both sides is higher and more stable.

[0073] Furthermore, the connection fastener 62 and the embedded groove 32 can be set to be clearance-fitted, and the single-side clearance between the connection fastener 62 and the embedded groove 32 is L1, L1 < 0.5 mm. And the gap between the connection fastener 62 and the embedded groove 32 is filled with glue. Through the above setting, it is convenient to insert the connection fastener 62 into the embedded groove 32, and at the same time, the connection between the connection fastener 62 and the end plate 3 can be strengthened after the glue is cured.

[0074] refer to Figure 4 As shown in , in some embodiments of the present application, the multi-row battery module further includes at least one middle plate 4, which is located between the two end plates 3 and divides the accommodation space into at least two accommodation sub-cavities. The middle plate 4 is connected to the side cold plate 2 at the end by bolts 61, and the bolts 61 pass through the side cold plate 2 and are threadedly connected to the middle plate 4. The middle plate 4 is connected to the side cold plate 2 in the middle by connecting fasteners 62, which pass through the side cold plate 2 and are plugged into the middle plates 4 on both sides.

[0075] Based on the above-mentioned embodiment of the present application, by setting the middle plate 4, when the length of the multi-row battery module is extended to form a long module, the setting of the middle plate 4 can strengthen the middle part of the long module. At the same time, the middle plate 4 is also connected to the side cold plate 2 through the connecting piece 6 to further improve the overall connection strength of the multi-row battery module.

[0076] Specifically, during the production, processing and assembly process, the number of intermediate plates 4 can be selected and set according to the length of the multiple rows of battery modules. When the length of the multiple rows of battery modules is longer, the number of intermediate plates 4 can be appropriately increased to further improve the overall connection strength of the multiple rows of battery modules.

[0077] In addition, it should be noted that in the present application, when the middle plate 4 and the side cold plate 2 are reinforced by the connector 6, since the battery modules 1 are arranged on both sides of the middle plate 4, the forces on both sides of the middle plate 4 are relatively balanced, so that the shear force on the connection position of the middle plate 4 and the side cold plate 2 is relatively small. Therefore, the position of the end of the middle plate 4 close to the side cold plate 2 can be selected according to the actual strength requirements to choose whether to set the limiter 5 to strengthen the connection strength of the connection position.

[0078] Furthermore, when the end plate 3 and the middle plate 4 are connected to the side cold plate 2 through the connecting piece 6, multiple connecting pieces 6 can be set at the same connection position. For example, when the end side cold plate 2 is connected to the end plate 3 or the middle plate 4, multiple bolts 61 can be sequentially set along the width direction of the side cold plate 2 for connection. Or when the middle side cold plate 2 is connected to the end plates 3 or the middle plates 4 on both sides, multiple connecting fasteners 62 can be sequentially set along the width direction of the side cold plate 2 for connection, thereby further strengthening the connection strength of the connection position between the side cold plate 2 and the end plate 3 and the middle plate 4.

[0079] Furthermore, in some embodiments of the present application, in order to further enhance the connection strength between the side cold plate 2 and the end plate 3 or the middle plate 4 and avoid damaging the flow channel in the side cold plate 2, corresponding settings can be made for the side cold plate 2 in the present application. For example, the width of the rib structure between the flow channels in the side cold plate 2 is widened, and the bolts 61 or the connecting fasteners 62 can be set at the rib position when being penetrated.

[0080] Alternatively, a reinforcing block may be embedded in the side cold plate 2, and the reinforcing block and the side cold plate 2 may be connected by welding or the like, and the bolts 61 or the connecting fasteners 62 may be arranged on the reinforcing block when being penetrated, thereby enhancing the strength of the connecting position.

[0081] In summary, in the present application, the strength of the connection position of the side cold plate 2 can be strengthened by any suitable method. Since the present application does not involve specific improvements to the above structure, it will not be described here.

[0082] On the basis of the above technical solution, according to the second aspect of the present application, reference Figures 9 and 10 As shown in , a battery pack is also provided, which includes a frame 7 and at least one of the above-mentioned multi-row battery modules, and the battery modules are arranged in sequence and fixed in the frame 7.

[0083] Based on the above-mentioned embodiments of the present application, a battery pack is formed by arranging multiple rows of battery modules in a frame 7, and the above-mentioned multiple rows of battery modules are based on the above-mentioned arrangement of the present application, and the connection strength between adjacent battery modules 1 is high and the heat dissipation effect is good, thereby improving the connection strength and heat dissipation effect of the battery pack as a whole. At the same time, in the above-mentioned arrangement, the frame structure formed by the side cold plate 2 and the end plate 3 can play a technical effect similar to the cross beam and longitudinal beam in the prior art, so that when the battery pack is arranged in groups, the cross beam structure and longitudinal beam structure can be completely or partially omitted, thereby further improving the overall integration of the battery pack.

[0084] Specifically, refer to Fig. 9 and Fig.10 As shown in , in the present application, when the above-mentioned multi-row battery modules are applied to a battery pack, when the number of rows of the multi-row battery modules is large, the arrangement of the longitudinal beams in the battery pack can be reduced accordingly, and when the width of the multi-row battery modules reaches the width inside the frame 7, the arrangement of the longitudinal beams can be completely omitted. Similarly, when the length of the multi-row battery modules is set to be longer, the arrangement of the crossbeams can be reduced or even directly omitted. Finally, when a single multi-row battery module is just accommodated in the frame 7, the arrangement of the crossbeams and the longitudinal beams can be omitted at the same time, thereby improving the degree of integration of the battery pack while ensuring the overall strength of the battery pack, and realizing a module-free battery pack (Cell To Pack, CTP) design.

[0085] In the present application, any suitable connection method can be selected between the multiple rows of battery modules and the frame 7.

[0086] refer to Fig.10 and Fig.11 As shown in , in an exemplary embodiment provided in the present application, an extended fin 21 is provided on the side of the side cold plate 2 at the end facing away from the battery cell module 1 , and the extended fin 21 is fixedly connected to the frame 7 .

[0087] Based on the above-mentioned embodiments of the present application, after the extended fin 21 extends out of the side cold plate 2, it can be fixedly connected to the frame 7 by screw connection or welding, and at the same time, a protrusion 72 can be provided at the corresponding position of the frame 7 to facilitate connection with the extended fin 21. At the same time, the extended fin 21 can be integrally formed with the side cold plate 2 by casting or other methods. Therefore, the provision of the extended fin 21 facilitates the fixed connection between the side cold plate 2 and the frame 7, and at the same time, it can avoid damage to the side cold plate 2 during connection.

[0088] In addition, the battery pack structure in the present application is not limited to the above components. In some other embodiments of the present application, the battery pack may also include a bottom guard plate, which is respectively connected to the frame 7 and multiple rows of battery modules.

[0089] Based on the above-mentioned embodiments of the present application, multiple rows of battery modules are protected from below by providing a bottom guard plate. At the same time, multiple rows of battery modules and the top of the frame 7 are directly connected to the vehicle body structure, thereby completing the fixed protection of multiple rows of battery modules while improving the degree of integration.

[0090] On the basis of the above technical solution, according to the third aspect of the present application, there is also provided an electrical device, which includes a device body and the above-mentioned battery pack, wherein the device body has a battery assembly cavity, and the battery pack is arranged in the battery assembly cavity.

[0091] The electrical equipment may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0092] Based on the above-mentioned embodiments of the present application, the electrical equipment provided by the present application includes the above-mentioned battery pack, and therefore also has the above-mentioned beneficial effects. In order to avoid repetition, they will not be described here.

[0093] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0095] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A multi-row battery module, characterized in that: The multi-row battery module comprises: At least two battery modules, each of which comprises a plurality of battery cells arranged in sequence; At least three side cold plates, at least three of the side cold plates are arranged in sequence, two end plates are arranged between any two adjacent side cold plates, at least three of the side cold plates cooperate with the end plates to form at least two accommodating spaces, and the battery cell modules are correspondingly arranged in the accommodating spaces; A plurality of connecting members are provided, wherein the connecting members penetrate through the side cold plate and are connected to the end plates on one side or both sides of the side cold plate.

2. The multi-row battery module according to claim 1, characterized in that: The side cold plates are provided with at least three; The side cold plate at the end is connected to the end plate through the connecting piece, the connecting piece is a bolt, the end of the end plate is directly or indirectly provided with a threaded hole, and the bolt is threadedly connected to the threaded hole; The side cold plate in the middle is connected to the end plate via the connecting piece, and the connecting piece is configured as a connecting fastener, the connecting fastener passes through the side cold plate, and both ends of the connecting fastener are respectively plugged into the end plates on both sides.

3. The multi-row battery module according to claim 2, characterized in that: The end of the end plate close to the side cold plate is provided with a limit cavity, a limit member is arranged in the limit cavity, and the limit member is in contact with the inner wall surface of the limit cavity; The threaded hole is provided on the stopper, and the bolt passes through the side cold plate and is threadedly connected to the threaded hole; The connecting fastener passes through the side cold plate and is inserted into the limiting member.

4. The multi-row battery module according to claim 3, characterized in that: The limiting member is connected to the inner wall of the limiting cavity by bolt connection or riveting.

5. The multi-row battery module according to claim 3, characterized in that: An embedded groove is formed in the end plate, and the end of the connecting fastener passes through the limiting member and is inserted into the embedded groove; An adhesive layer is provided on the surface of the connecting fastener to be fixed with the limiting member and the embedded groove.

6. The multi-row battery module according to any one of claims 1 to 5, characterized in that: The multi-row battery module further comprises at least one middle plate, which is located between the two end plates and divides the accommodation space into at least two accommodation sub-cavities; The middle plate is connected to the side cold plate at the end by bolts, and the bolts pass through the side cold plate and are threadedly connected to the middle plate; The middle plate is connected to the side cold plates in the middle by connecting fasteners, and the connecting fasteners penetrate through the side cold plates and are plugged into the middle plates on both sides.

7. A battery pack, characterized in that: The battery pack comprises: a frame; and, At least one multi-row battery module according to any one of claims 1 to 6, wherein the battery modules are arranged in sequence and fixed in the frame.

8. The battery pack according to claim 7, characterized in that: An extended fin is provided on a side of the side cold plate at the end facing away from the battery core module, and the extended fin is fixedly connected to the frame.

9. The battery pack according to claim 7, characterized in that: The battery pack also includes a bottom guard plate, which is respectively connected to the frame and the multiple rows of battery modules.

10. An electrical device, characterized in that: The electrical equipment includes: a device body having a battery assembly cavity; and, The battery pack according to any one of claims 7 to 9, wherein the battery pack is disposed in the battery assembly cavity.

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